A theoretical model of Gravitational collapse can be developed using equations from the theory of General relativity. Experimental observation of of Xray radiation could test these calculations and help us understand whether _______ _______ exist at the center of Andromeda galaxy.

Dark ______ and dark _______ are the current leading topics in astronomy,as their discovery and controversy originated during the study of the galaxies.

The Sun has steadily _______ in luminosity over the course of its life, by 40% since it first became a main-sequence star. (increase or decrease?)

The visible outer surface of the Sun is called the photosphere. Above this layer is a thin region known as the chromosphere, which is surrounded by a transition region between the sun and the corona, which can be thought as the highest and part of the Sun's atmosphere. Is this upper atmosphere hotter or colder than the region below?

At the center of the Sun is the core region, a volume of sufficient _________ and _________for nuclear fusion to occur.

A _____ _______ of particles constantly streams outward from the Sun

Planetary science: (Figure: Black spot upper center) What is the black spot in the upper center? Where is it?

The Solar System is subdivided into the inner planets, the asteroid belt, and the outer planets. Name two outer planets.

The planets were formed in the protoplanetary disk that surrounded the early Sun. (Proto means "first" and the disk is a disk of gas and dust). Name one process that brought this gas and dust together to become the protoplanets.

What evidence do we have that there was an early period of intense bombardment?

(Figure: The ant nebula). This is a _______ star.

Star formation occurs in dense regions of dust and gas, known as giant _______ _______.

Almost all elements heavier than ________ and _______ were created inside the cores of stars.

The characteristics of the resulting star depend primarily upon how much ______it had at the beginning.

The final fate of the star depends on its mass, with stars of mass greater than about eight times the Sun becoming _____________.

Our solar system] (i.e. Sun) orbits within the __________ __________

In the center of the Milky Way is tis believed to be a ________ __________ at the center.

Kinematic studies of matter in the Milky Way and other galaxies refers to how fast the stars are moving. These studies demonstrated that there is more ___________ than can be accounted for by visible matter.

An active galaxy is emitting a significant amount of its energy from a source usually thought to be a super-massive black hole that is emitting radiation that gets it energy from _________(finish the sentence).

Cosmology:could be considered the study of the universe _________(finish the sentence).

The most well known field where amateur astronomers make significant contributions is the search for comets. Under the magnification used by the professional telescopes, the sky is just too 'big' for the big telescopes to track every night, especially since a professional telescope might spend hours collecting light from one source. But in the 1930s, Karl Janksy made pioneering contributions in field of ______ astronomy.